Also, known simpler as how the market will react to a product due to an increase or decrease in price. In a competitive market system, PED greatly effects an industry do to the close representation of similar substitutes each firm is selling. If one firms price increases or decrease the PED will impact them deeply and the industry. In a monopoly market system, PED still affects the industry due to consumer behavior. If a firm in a monopoly market system sets their prices too high, they will still lose demand of the consumer even though there aren’t any substitutes available. The consumer would have